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Diffstat (limited to 'nx-X11/extras/Mesa/src/glx/x11/pixel.c')
| -rw-r--r-- | nx-X11/extras/Mesa/src/glx/x11/pixel.c | 443 |
1 files changed, 443 insertions, 0 deletions
diff --git a/nx-X11/extras/Mesa/src/glx/x11/pixel.c b/nx-X11/extras/Mesa/src/glx/x11/pixel.c new file mode 100644 index 000000000..3b3a1811a --- /dev/null +++ b/nx-X11/extras/Mesa/src/glx/x11/pixel.c @@ -0,0 +1,443 @@ +/* $XFree86: xc/lib/GL/glx/pixel.c,v 1.8 2003/09/28 20:15:04 alanh Exp $ */ +/* +** License Applicability. Except to the extent portions of this file are +** made subject to an alternative license as permitted in the SGI Free +** Software License B, Version 1.1 (the "License"), the contents of this +** file are subject only to the provisions of the License. You may not use +** this file except in compliance with the License. You may obtain a copy +** of the License at Silicon Graphics, Inc., attn: Legal Services, 1600 +** Amphitheatre Parkway, Mountain View, CA 94043-1351, or at: +** +** http://oss.sgi.com/projects/FreeB +** +** Note that, as provided in the License, the Software is distributed on an +** "AS IS" basis, with ALL EXPRESS AND IMPLIED WARRANTIES AND CONDITIONS +** DISCLAIMED, INCLUDING, WITHOUT LIMITATION, ANY IMPLIED WARRANTIES AND +** CONDITIONS OF MERCHANTABILITY, SATISFACTORY QUALITY, FITNESS FOR A +** PARTICULAR PURPOSE, AND NON-INFRINGEMENT. +** +** Original Code. The Original Code is: OpenGL Sample Implementation, +** Version 1.2.1, released January 26, 2000, developed by Silicon Graphics, +** Inc. The Original Code is Copyright (c) 1991-2000 Silicon Graphics, Inc. +** Copyright in any portions created by third parties is as indicated +** elsewhere herein. All Rights Reserved. +** +** Additional Notice Provisions: The application programming interfaces +** established by SGI in conjunction with the Original Code are The +** OpenGL(R) Graphics System: A Specification (Version 1.2.1), released +** April 1, 1999; The OpenGL(R) Graphics System Utility Library (Version +** 1.3), released November 4, 1998; and OpenGL(R) Graphics with the X +** Window System(R) (Version 1.3), released October 19, 1998. This software +** was created using the OpenGL(R) version 1.2.1 Sample Implementation +** published by SGI, but has not been independently verified as being +** compliant with the OpenGL(R) version 1.2.1 Specification. +** +*/ + +#include "packrender.h" + +static const GLubyte MsbToLsbTable[256] = { + 0x00, 0x80, 0x40, 0xc0, 0x20, 0xa0, 0x60, 0xe0, + 0x10, 0x90, 0x50, 0xd0, 0x30, 0xb0, 0x70, 0xf0, + 0x08, 0x88, 0x48, 0xc8, 0x28, 0xa8, 0x68, 0xe8, + 0x18, 0x98, 0x58, 0xd8, 0x38, 0xb8, 0x78, 0xf8, + 0x04, 0x84, 0x44, 0xc4, 0x24, 0xa4, 0x64, 0xe4, + 0x14, 0x94, 0x54, 0xd4, 0x34, 0xb4, 0x74, 0xf4, + 0x0c, 0x8c, 0x4c, 0xcc, 0x2c, 0xac, 0x6c, 0xec, + 0x1c, 0x9c, 0x5c, 0xdc, 0x3c, 0xbc, 0x7c, 0xfc, + 0x02, 0x82, 0x42, 0xc2, 0x22, 0xa2, 0x62, 0xe2, + 0x12, 0x92, 0x52, 0xd2, 0x32, 0xb2, 0x72, 0xf2, + 0x0a, 0x8a, 0x4a, 0xca, 0x2a, 0xaa, 0x6a, 0xea, + 0x1a, 0x9a, 0x5a, 0xda, 0x3a, 0xba, 0x7a, 0xfa, + 0x06, 0x86, 0x46, 0xc6, 0x26, 0xa6, 0x66, 0xe6, + 0x16, 0x96, 0x56, 0xd6, 0x36, 0xb6, 0x76, 0xf6, + 0x0e, 0x8e, 0x4e, 0xce, 0x2e, 0xae, 0x6e, 0xee, + 0x1e, 0x9e, 0x5e, 0xde, 0x3e, 0xbe, 0x7e, 0xfe, + 0x01, 0x81, 0x41, 0xc1, 0x21, 0xa1, 0x61, 0xe1, + 0x11, 0x91, 0x51, 0xd1, 0x31, 0xb1, 0x71, 0xf1, + 0x09, 0x89, 0x49, 0xc9, 0x29, 0xa9, 0x69, 0xe9, + 0x19, 0x99, 0x59, 0xd9, 0x39, 0xb9, 0x79, 0xf9, + 0x05, 0x85, 0x45, 0xc5, 0x25, 0xa5, 0x65, 0xe5, + 0x15, 0x95, 0x55, 0xd5, 0x35, 0xb5, 0x75, 0xf5, + 0x0d, 0x8d, 0x4d, 0xcd, 0x2d, 0xad, 0x6d, 0xed, + 0x1d, 0x9d, 0x5d, 0xdd, 0x3d, 0xbd, 0x7d, 0xfd, + 0x03, 0x83, 0x43, 0xc3, 0x23, 0xa3, 0x63, 0xe3, + 0x13, 0x93, 0x53, 0xd3, 0x33, 0xb3, 0x73, 0xf3, + 0x0b, 0x8b, 0x4b, 0xcb, 0x2b, 0xab, 0x6b, 0xeb, + 0x1b, 0x9b, 0x5b, 0xdb, 0x3b, 0xbb, 0x7b, 0xfb, + 0x07, 0x87, 0x47, 0xc7, 0x27, 0xa7, 0x67, 0xe7, + 0x17, 0x97, 0x57, 0xd7, 0x37, 0xb7, 0x77, 0xf7, + 0x0f, 0x8f, 0x4f, 0xcf, 0x2f, 0xaf, 0x6f, 0xef, + 0x1f, 0x9f, 0x5f, 0xdf, 0x3f, 0xbf, 0x7f, 0xff, +}; + +static const GLubyte LowBitsMask[9] = { + 0x00, 0x01, 0x03, 0x07, 0x0f, 0x1f, 0x3f, 0x7f, 0xff, +}; + +static const GLubyte HighBitsMask[9] = { + 0x00, 0x80, 0xc0, 0xe0, 0xf0, 0xf8, 0xfc, 0xfe, 0xff, +}; + + +/* +** Copy bitmap data from clients packed memory applying unpacking modes as the +** data is transfered into the destImage buffer. Return in modes the +** set of pixel modes that are to be done by the server. +*/ +static void FillBitmap(__GLXcontext *gc, GLint width, GLint height, + GLenum format, const GLvoid *userdata, + GLubyte *destImage) +{ + const __GLXattribute * state = gc->client_state_private; + GLint rowLength = state->storeUnpack.rowLength; + GLint alignment = state->storeUnpack.alignment; + GLint skipPixels = state->storeUnpack.skipPixels; + GLint skipRows = state->storeUnpack.skipRows; + GLint lsbFirst = state->storeUnpack.lsbFirst; + GLint elementsLeft, bitOffset, currentByte, nextByte, highBitMask; + GLint lowBitMask, i; + GLint components, groupsPerRow, rowSize, padding, elementsPerRow; + const GLubyte *start, *iter; + + if (rowLength > 0) { + groupsPerRow = rowLength; + } else { + groupsPerRow = width; + } + components = __glElementsPerGroup(format,GL_BITMAP); + rowSize = (groupsPerRow * components + 7) >> 3; + padding = (rowSize % alignment); + if (padding) { + rowSize += alignment - padding; + } + start = ((const GLubyte*) userdata) + skipRows * rowSize + + ((skipPixels * components) >> 3); + bitOffset = (skipPixels * components) & 7; + highBitMask = LowBitsMask[8-bitOffset]; + lowBitMask = HighBitsMask[bitOffset]; + elementsPerRow = width * components; + for (i = 0; i < height; i++) { + elementsLeft = elementsPerRow; + iter = start; + while (elementsLeft) { + /* First retrieve low bits from current byte */ + if (lsbFirst) { + currentByte = MsbToLsbTable[iter[0]]; + } else { + currentByte = iter[0]; + } + if (bitOffset) { + /* Need to read next byte to finish current byte */ + if (elementsLeft > (8 - bitOffset)) { + if (lsbFirst) { + nextByte = MsbToLsbTable[iter[1]]; + } else { + nextByte = iter[1]; + } + currentByte = + ((currentByte & highBitMask) << bitOffset) | + ((nextByte & lowBitMask) >> (8 - bitOffset)); + } else { + currentByte = + ((currentByte & highBitMask) << bitOffset); + } + } + if (elementsLeft >= 8) { + *destImage = currentByte; + elementsLeft -= 8; + } else { + *destImage = currentByte & HighBitsMask[elementsLeft]; + elementsLeft = 0; + } + destImage++; + iter++; + } + start += rowSize; + } +} + +/* +** Extract array from user's data applying all pixel store modes. +** The internal packed array format used has LSB_FIRST = FALSE and +** ALIGNMENT = 1. +*/ +void __glFillImage(__GLXcontext *gc, GLint dim, GLint width, GLint height, + GLint depth, GLenum format, GLenum type, + const GLvoid *userdata, GLubyte *newimage, GLubyte *modes) +{ + const __GLXattribute * state = gc->client_state_private; + GLint rowLength = state->storeUnpack.rowLength; + GLint imageHeight = state->storeUnpack.imageHeight; + GLint alignment = state->storeUnpack.alignment; + GLint skipPixels = state->storeUnpack.skipPixels; + GLint skipRows = state->storeUnpack.skipRows; + GLint skipImages = state->storeUnpack.skipImages; + GLint swapBytes = state->storeUnpack.swapEndian; + GLint components, elementSize, rowSize, padding, groupsPerRow, groupSize; + GLint elementsPerRow, imageSize, rowsPerImage, h, i, j, k; + const GLubyte *start, *iter, *itera, *iterb, *iterc; + GLubyte *iter2; + + if (type == GL_BITMAP) { + FillBitmap(gc, width, height, format, userdata, newimage); + } else { + components = __glElementsPerGroup(format,type); + if (rowLength > 0) { + groupsPerRow = rowLength; + } else { + groupsPerRow = width; + } + if (imageHeight > 0) { + rowsPerImage = imageHeight; + } else { + rowsPerImage = height; + } + + elementSize = __glBytesPerElement(type); + groupSize = elementSize * components; + if (elementSize == 1) swapBytes = 0; + + rowSize = groupsPerRow * groupSize; + padding = (rowSize % alignment); + if (padding) { + rowSize += alignment - padding; + } + imageSize = rowSize * rowsPerImage; + start = ((const GLubyte*) userdata) + skipImages * imageSize + + skipRows * rowSize + skipPixels * groupSize; + iter2 = newimage; + elementsPerRow = width * components; + + if (swapBytes) { + itera = start; + for (h = 0; h < depth; h++) { + iterb = itera; + for (i = 0; i < height; i++) { + iterc = iterb; + for (j = 0; j < elementsPerRow; j++) { + for (k = 1; k <= elementSize; k++) { + iter2[k-1] = iterc[elementSize - k]; + } + iter2 += elementSize; + iterc += elementSize; + } + iterb += rowSize; + } + itera += imageSize; + } + } else { + itera = start; + for (h = 0; h < depth; h++) { + if (rowSize == elementsPerRow * elementSize) { + /* Ha! This is mondo easy! */ + __GLX_MEM_COPY(iter2, itera, + elementsPerRow * elementSize * height); + iter2 += elementsPerRow * elementSize * height; + } else { + iter = itera; + for (i = 0; i < height; i++) { + __GLX_MEM_COPY(iter2, iter, elementsPerRow*elementSize); + iter2 += elementsPerRow * elementSize; + iter += rowSize; + } + } + itera += imageSize; + } + } + } + + /* Setup store modes that describe what we just did */ + if (modes) { + if ( dim < 3 ) { + (void) memcpy( modes, __glXDefaultPixelStore + 4, 20 ); + } + else { + (void) memcpy( modes, __glXDefaultPixelStore + 0, 36 ); + } + } +} + +/* +** Empty a bitmap in LSB_FIRST=GL_FALSE and ALIGNMENT=4 format packing it +** into the clients memory using the pixel store PACK modes. +*/ +static void EmptyBitmap(__GLXcontext *gc, GLint width, GLint height, + GLenum format, const GLubyte *sourceImage, + GLvoid *userdata) +{ + const __GLXattribute * state = gc->client_state_private; + GLint rowLength = state->storePack.rowLength; + GLint alignment = state->storePack.alignment; + GLint skipPixels = state->storePack.skipPixels; + GLint skipRows = state->storePack.skipRows; + GLint lsbFirst = state->storePack.lsbFirst; + GLint components, groupsPerRow, rowSize, padding, elementsPerRow; + GLint sourceRowSize, sourcePadding, sourceSkip; + GLubyte *start, *iter; + GLint elementsLeft, bitOffset, currentByte, highBitMask, lowBitMask; + GLint writeMask, i; + GLubyte writeByte; + + components = __glElementsPerGroup(format,GL_BITMAP); + if (rowLength > 0) { + groupsPerRow = rowLength; + } else { + groupsPerRow = width; + } + + rowSize = (groupsPerRow * components + 7) >> 3; + padding = (rowSize % alignment); + if (padding) { + rowSize += alignment - padding; + } + sourceRowSize = (width * components + 7) >> 3; + sourcePadding = (sourceRowSize % 4); + if (sourcePadding) { + sourceSkip = 4 - sourcePadding; + } else { + sourceSkip = 0; + } + start = ((GLubyte*) userdata) + skipRows * rowSize + + ((skipPixels * components) >> 3); + bitOffset = (skipPixels * components) & 7; + highBitMask = LowBitsMask[8-bitOffset]; + lowBitMask = HighBitsMask[bitOffset]; + elementsPerRow = width * components; + for (i = 0; i < height; i++) { + elementsLeft = elementsPerRow; + iter = start; + writeMask = highBitMask; + writeByte = 0; + while (elementsLeft) { + /* Set up writeMask (to write to current byte) */ + if (elementsLeft + bitOffset < 8) { + /* Need to trim writeMask */ + writeMask &= HighBitsMask[bitOffset+elementsLeft]; + } + + if (lsbFirst) { + currentByte = MsbToLsbTable[iter[0]]; + } else { + currentByte = iter[0]; + } + + if (bitOffset) { + writeByte |= (sourceImage[0] >> bitOffset); + currentByte = (currentByte & ~writeMask) | + (writeByte & writeMask); + writeByte = (sourceImage[0] << (8 - bitOffset)); + } else { + currentByte = (currentByte & ~writeMask) | + (sourceImage[0] & writeMask); + } + + if (lsbFirst) { + iter[0] = MsbToLsbTable[currentByte]; + } else { + iter[0] = currentByte; + } + + if (elementsLeft >= 8) { + elementsLeft -= 8; + } else { + elementsLeft = 0; + } + sourceImage++; + iter++; + writeMask = 0xff; + } + if (writeByte) { + /* Some data left over that still needs writing */ + writeMask &= lowBitMask; + if (lsbFirst) { + currentByte = MsbToLsbTable[iter[0]]; + } else { + currentByte = iter[0]; + } + currentByte = (currentByte & ~writeMask) | (writeByte & writeMask); + if (lsbFirst) { + iter[0] = MsbToLsbTable[currentByte]; + } else { + iter[0] = currentByte; + } + } + start += rowSize; + sourceImage += sourceSkip; + } +} + +/* +** Insert array into user's data applying all pixel store modes. +** The packed array format from the server is LSB_FIRST = FALSE, +** SWAP_BYTES = the current pixel storage pack mode, and ALIGNMENT = 4. +** Named __glEmptyImage() because it is the opposite of __glFillImage(). +*/ +/* ARGSUSED */ +void __glEmptyImage(__GLXcontext *gc, GLint dim, GLint width, GLint height, + GLint depth, GLenum format, GLenum type, + const GLubyte *sourceImage, GLvoid *userdata) +{ + const __GLXattribute * state = gc->client_state_private; + GLint rowLength = state->storePack.rowLength; + GLint imageHeight = state->storePack.imageHeight; + GLint alignment = state->storePack.alignment; + GLint skipPixels = state->storePack.skipPixels; + GLint skipRows = state->storePack.skipRows; + GLint skipImages = state->storePack.skipImages; + GLint components, elementSize, rowSize, padding, groupsPerRow, groupSize; + GLint elementsPerRow, sourceRowSize, sourcePadding, h, i; + GLint imageSize, rowsPerImage; + GLubyte *start, *iter, *itera; + + if (type == GL_BITMAP) { + EmptyBitmap(gc, width, height, format, sourceImage, userdata); + } else { + components = __glElementsPerGroup(format,type); + if (rowLength > 0) { + groupsPerRow = rowLength; + } else { + groupsPerRow = width; + } + if (imageHeight > 0) { + rowsPerImage = imageHeight; + } else { + rowsPerImage = height; + } + elementSize = __glBytesPerElement(type); + groupSize = elementSize * components; + rowSize = groupsPerRow * groupSize; + padding = (rowSize % alignment); + if (padding) { + rowSize += alignment - padding; + } + sourceRowSize = width * groupSize; + sourcePadding = (sourceRowSize % 4); + if (sourcePadding) { + sourceRowSize += 4 - sourcePadding; + } + imageSize = sourceRowSize * rowsPerImage; + start = ((GLubyte*) userdata) + skipImages * imageSize + + skipRows * rowSize + skipPixels * groupSize; + elementsPerRow = width * components; + + itera = start; + for (h = 0; h < depth; h++) { + if ((rowSize == sourceRowSize) && (sourcePadding == 0)) { + /* Ha! This is mondo easy! */ + __GLX_MEM_COPY(itera, sourceImage, + elementsPerRow * elementSize * height); + sourceImage += elementsPerRow * elementSize * height; + } else { + iter = itera; + for (i = 0; i < height; i++) { + __GLX_MEM_COPY(iter, sourceImage, + elementsPerRow * elementSize); + sourceImage += sourceRowSize; + iter += rowSize; + } + } + itera += imageSize; + } + } +} |